Insulated nippers and cutting-instrument



(No Model.)

I. M. CASEY. INSULATED NIPPERS AND CUTTING INSTRUMENT.

No. 409,097. Patented Aug. 13, 1889.

N. PETERS, Phclo-Lilhngmpher, Washington, 11 Q,

UNITED STATES PATENT OFFICE.

FIRMIN MICHAEL CASEY, OF MOUNT VERNON, NEWV YORK.

INSULATED NIPPERS AND CUTTING-INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 409,097, dated August 13, 1889. Application filed January 27, 1887. $erie1No. 225,666. (No specimens.)

To all whom it may concern:

Be it known that I, FIRMIN MICHAEL CASEY, a citizen of the United States, residing at Mount Vernon, in the county of WVestchester and State of New York, have invented new and useful Improvements in Insulated Nippers and Cutting-Instruments, of which the following is a specification.

This invention relates to the insulation of nippers and cutting-instruments in such a manner that an operator in cutting or handling therewith wires conveying a current of electricity will be protected from the electric current. This result is accomplished by covering or coating the handles of the instruments with insulating materialsuch,for instance, as glass, porcelain, or other vitreous materialso that when the operator uses the insulated instrument the charge or current of electricity will not be conveyed to his hand or body through or by means of its handle, and consequently he will be enabled to use the nippers or instrument with safety, and to cut the electric wires without danger of diverting the electric current through the handle to his hand or body.

My invention is further described hereinafter, reference being had to the drawings, of which- Figure l is a sectional perspective of nip pers to which this improvement is applied. Fig 2 isacross-section in thelines ocxof Fig. 1.

Si mila r letters indicate corresponding parts.

The letter A designates the handles of the nippers, which are coated or covered with suitable vitreous insulating material that will successfully resist the passage of a current of electricity. In order to properly secure the insulating material on the handles, so that it will not work off by use, recesses B B are formed in the handles, and the insulating material C is pressed into the recesses or caused to engage therewith in such a manner that the ends and sides of the recesses act as shoulders to prevent the insulating material from being moved, or from sliding on the handles, and to cause a permanent engagement between them.

sulating materiahso as to fully protect the hand when the workman is using the instrument, and prevent the passage of the electric current from the head of the nippers into the handles.

This invention relates to all metallic nippers and cutting-instruments whose handles or jaws have a scissors-like action for grasping, handling, or cutting wires or other electric conductors.

The insulating material used in carrying out this invention consists of glass, porcelain, or other suitable or efficient vitreous insulating fabric or material.

' I do not restrict myself to the form of re cess shown in the drawings, nor to the location thereof, as shown, as the form and location can be changed to suit the character of theinsulating material, and to facilitate the application of the insulating material to the handles and insure its adhesion thereto.

I am aware that dental forceps have been sheathed with rubber orot-her non-conducting substance, and such I therefore disclaim.

hat I claim as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, nippers having handles covered with a vitreous insulating material, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

FIRMIN MICHAEL CASEY. [L. s]

Vitnesses: s,

ISAAC N. PRESSEY,

O. H. OSTRANDER.

I11 order to prevent 

